:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --line: #e3e3e0;
  --accent: #2f5bd3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141416;
    --card: #1e1e21;
    --text: #ececef;
    --muted: #a0a0a8;
    --line: #2f2f34;
    --accent: #8aa8ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 15px; margin-bottom: 32px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 28px; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
.lead { color: var(--muted); margin: 0 0 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 8px 24px 24px; }
dl { display: grid; grid-template-columns: 9em 1fr; gap: 6px 16px; margin: 16px 0 0; }
dt { color: var(--muted); }
dd { margin: 0; }
ul { padding-left: 20px; }
footer { color: var(--muted); font-size: 14px; margin-top: 32px; }
@media (max-width: 480px) { dl { grid-template-columns: 1fr; } dd { margin-bottom: 8px; } }